Carbon deposition-resistant agent and preparation method thereof
A technology of carbon deposition and solvent, which is used in fuel additives, petroleum industry, liquid carbon-containing fuels, etc., to achieve the effect of preventing carbon deposition and strong adsorption
Inactive Publication Date: 2016-01-20
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
[0005] According to the anti-coking principle of petrochemical diesel oil, generally use highly polar, surface active and dispersing agents, easy to form a protective film on the metal surface, and slightly alkaline detergents to prevent the formation of coke, such as polyetheramine, but It is not enough to have a detergent for biodiesel compounded with vegetable oils without methylation chemical processing, because vegetable oil molecules contain extremely high unsaturated double bonds, that is, unsaturated fatty acids, and vegetable oils are mainly composed of more polar High molecular weight triglycerides, a small amount of free fatty acids, and vegetable oils are easy to oxidize and polymerize into macromolecular substances that are very viscous and easy to form carbon deposits.
Method used
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Effect test
Embodiment 1
[0033] First place the three-necked flask in an ice-water bath, install a stirrer and a reflux condenser, add 200mL of tetrahydrofuran, add 66.0g of nonylphenol polyoxyethylene ether to dissolve it, and add toluene-2,4-diisocyanate 17.4 g; 0.5 hours later, 16.6 g of 2-tert-butylhydroquinone was added. After the reaction became stable, the ice-water bath was removed, and the reaction was continued at room temperature for 1 hour, then the temperature was raised to 60°C, and the reaction temperature was maintained at 60°C. After 4 hours of reaction, a wine-red jelly was obtained. The termination of the reaction was marked by the disappearance of the absorption of the -NCO group measured by infrared spectroscopy. The crude product was washed successively with dilute alkaline solution, saturated brine and distilled water, and the purity of the product was detected by TLC (chloroform was used as developing solvent).
Embodiment 2
[0035] Anti-coking effect evaluation
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The invention discloses a carbon deposition-resistant agent for high-unsaturation degree compound biodiesel or biodiesel and a preparation method thereof. The preparation method comprises that alkylphenol ethoxylate and toluene diisocynate are stirred and mixed in a solvent in an ice bath, tert-butylhydroquinone is added into the mixture, the mixture undergoes a reaction with stirring at a reaction temperature of 0-60 DEG C for 3-5h, and the product is purified to form wine red jelly which is the carbon deposition-resistant agent. Under the conditions of a high temperature and oxygen, the compound biodiesel (prepared from jatropha seed oil free of methyl esterification chemical treatment or its plant oil and viscosity and cetane number adjustment agents) is oxidized easily and undergoes a polymerization reaction to produce deposited carbon. The carbon deposition-resistant agent has characteristics of a cleaning agent and an anti-oxidant and has ideal performances of preventing compound biodiesel carbon deposition in a diesel engine. Through a SH / T 0160-92 method, a carbon residue value of the compound biodiesel is 29% and a carbon residue value of diesel oil 0# is 0.25%.
Description
1. Technical field [0001] The present invention relates to a kind of anti-coking agent, and it has cleaning agent and anti-oxidant characteristic concurrently, relates to a kind of anti-coking agent especially can prevent by jatropha seed oil (or other vegetable oil) not through methyl esterification chemical processing, and directly with viscosity adjusting agent The invention relates to an anti-coking agent for coking generated by biodiesel compounded with a cetane number improver and a preparation method thereof. 2. Technical Background [0002] Carbon deposition (carbon deposition) is a black solid compound with hard texture, strong adhesion, and insoluble that is gradually formed due to incomplete combustion of fuel and lubricating oil in diesel engines, oxidation, decomposition, and polymerization at high temperatures. The carbon deposits gradually produced in the valves, fuel injectors, pistons, combustion chambers, etc. of the diesel engine will reduce the heat dissi...
Claims
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IPC IPC(8): C10L1/238C10L10/04C08G65/333C08G65/331
Inventor 梁渠汪顺兴
Owner CHENGDU UNIVERSITY OF TECHNOLOGY